26.12.16.5 Transaction Summary Tables

The Performance Schema maintains tables for collecting current
and recent transaction events, and aggregates that information
in summary tables.
Section 26.12.7, “Performance Schema Transaction Tables”
describes the events on which transaction summaries are based.
See that discussion for information about the content of
transaction events, the current and historical transaction
event tables, and how to control transaction event collection,
which is disabled by default.

These are similar to the COUNT_STAR and
xxx_TIMER_WAIT
columns, but summarize read-write transactions only. The
transaction access mode specifies whether transactions
operate in read/write or read-only mode.

These are similar to the COUNT_STAR and
xxx_TIMER_WAIT
columns, but summarize read-only transactions only. The
transaction access mode specifies whether transactions
operate in read/write or read-only mode.